” averaging anomaly data from dramaticaly different temperature ranges provides a meaningless result.”

Watts Up With That?

Anomalies are unsuitable measure of global temperature trends

Guest post by David M. Hoffer

An anomaly is simply a value that is arrived at by comparing the current measurement to some average measurement.  So, if the average temperature over the last 30 years is 15 degrees C, and this year’s average is 16 degrees, that gives us an anomaly of one degree.  Of what value are anomalies? Are they a suitable method for discussing temperature data as it applies to the climate debate?
On the surface, anomalies seem to have some use.  But the answer to the second question is rather simple.

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